for User Interface Event Handlers
onButtonClick = "ctrlDelete (_this select 0); systemChat 'You will never see this';"; // Will crash the game
onButtonClick = "systemChat 'Bye bye button!'; ctrlDelete (_this select 0);"; // Works just fine
onButtonClick = "[] spawn { ctrlDelete (_this select 0); systemChat 'Bye bye button!'; };"; // Works just fine as well